https://www.gamespot.com/articles/fortnite-week-2-challenges-film-cameras-search-bet/1100-6458797/

Season 4 of Fortnite: Battle Royale's Week 2 challenges are now live, providing players who own the Battle Pass on PC, PS4, Xbox One, and mobile with seven different objectives to complete. Some of these are fairly routine; others make use of new Season 4 gameplay elements (such as Hop Rocks), while others offer more challenging tasks that could require the use of a map. Here's how to complete them all.

Reward: 5k XP (after completing four challenges)